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Note 17 – Share Based Awards (Tables)
6 Months Ended
Oct. 31, 2022
Share-Based Payment Arrangement [Abstract]  
[custom:ScheduleOfAssumptionsUsed1TableTextBlock]
    2022    2021 
Exercise Price  $2.38   $2.412.60 
Stock price on date of grant   2.38    2.412.60 
Risk-free interest rate    3.34%   0.471.57% 
Dividend yield            
Expected term (years)   8.25    3.75 10.00 
Volatility   260.06%   210.68214.17% 
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
Options   Shares   Weighted-Average Exercise Price   Weighted-Average Remaining Contractual Term   Aggregate Intrinsic Value
Outstanding as of April 30, 2021     2,197,475     $ 1.79       8.68        4,943,870   
Granted     1,681,000       2.58                  
Exercised     (150,000     2.49                  
Forfeited or expired     (34,333     2.11                  
Outstanding as of April 30, 2022     3,694,142     2.17       8.56        1,407,545   
Granted     397,000       2.38                  
Exercised                               
Forfeited or expired     (96,584     2.48                  
Outstanding as of October 31, 2022     3,994,558     2.18       8.22     608,162  
Exercisable as of October 31, 2022     2,569,306     $ 2.06       7.48     $ 559,578  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Restricted Stock  Shares  Weighted Average Grant-Date Fair Value Per Share
Unvested and outstanding as of April 30, 2021   687,500   $2.69 
Granted   995,659    2.55 
Vested   (599,484)   2.64 
Forfeited            
Unvested and outstanding as of April 30, 2022   1,083,675    2.59 
Granted   696,000    2.27 
Vested   (673,161)   2.45 
Forfeited            
Unvested and outstanding as of October 31, 2022   1,106,514   $2.48 
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block]
         
  

Three months ended

October 31,

 

Six months ended

October 31,

   2022  2021  2022  2021
Operations  $225,879   $311,346   $384,310   $374,607 
Research and development   209,497    84,751    354,295    141,231 
Sales and marketing   162,269    114,088    269,343    158,832 
General and administrative   649,151    389,752    994,319    609,353 
Total  $1,246,796   $899,937   $2,002,267   $1,284,023